Natural killer cells are capable of ____
a. stimulating T cell memory
b. killing bacteria in the interstitial fluid
c. destroying body cells lacking MHC markers
d. shutting down adaptive immune responses
e. destroying parasites in the bloodstream
ANSWER: c
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Picea glauca is a seed-bearing plant. What other characteristic MUST be true of this species?
A. It produces flowers. B. It produces fruits. C. The gametophyte is the dominant generation. D. It has vascular tissue. E. Double-fertilization results in the production of endosperm.
Pinocytosis and phagocytosis are accomplished in the cell by the ____
a. nucleus b. lysosome c. endoplasmic reticulum d. plasma membrane e. mitochondria
Four of the five answers listed below possess
some type of coelom. Select the EXCEPTION.
a. crustaceans b. annelids c. arthropods d. mollusks e. cnidarians
Which disease has been eliminated through the use of vaccines?
A) tuberculosis B) measles C) rubella D) smallpox E) influenza